Atheros Bluetooth alternative.

[bgrau]

If you have Yosemite with no available Atheros adapters drivers, the solution to get Bluetooth to work is to get a compatible usb adapter (Broadcom are usually good).

 

You need then to disable the Atheros adapter, the best way to do this I found is to delete the associated kext which is in:

 

/S/L/E/IO80211Family.kext/Contents/Plugins > AirPortAtheros40.kext

 

then correct ownership on IO80211Family.kext,

run kext utility,

and reboot.

 

Bluetooth on the usb adapter will then work fine.

 

Of course, you will still need another adapter for the wifi, if you aren't using ethernet, for which you need an adapter too, etc